We cannot believe the lengths dedicated fans go to for a quick meeting with their favorite celebs! When it comes to fandom, which of these megastars has the most hardcore following?

Demi Lovato‘s fans are called “Lovatics” and some of them love the 18-year-old singer so much, they even waited outside her Florida hotel starting at 6 a.m. July 28 so they could say hello and take a picture when she came home that night! As sweet as that is, it’s kindergarten level fandom compared to what other diehards will do to meet their favorite celeb. Click through these pics of Robert Pattinson, Kristen Stewart, Justin Bieber and vote on who has the most loyal fan following!

Selena Gomez has 22.5 million fans on Facebook, which is more than President Barack Obama! Selenators even created the ‘Selena Fan: Selena Gomez Tribute App’ for iPhones and iPads.

Kristen Stewart has said her fans even give life to her non-Twilight films, just to show their support. Plus, the 21-year-old actress has fans who camped overnight to see her at Comic-Con — and she passed out breakfast to them!

Robert Pattinson might have the most unique fan stories! The 25-year-old vamp stud once bit a Twihard’s infant for a photo. Also, people from around the world flew to Italy to see Rob shoot the scene where he ‘steps into the sunlight’ and died.

Justin Bieber is the modern day Elvis! Girls camped out all night for appearances of the Biebs in Australia, and 10 Beliebers had to be treated by paramedics because they fainted. Not to mention, Justin, 17, has 11 million Twitter followers…

Miley Cyrus has often said her “fans are the best” because of their undying support for the former Disney starlet.

Demi Lovato has thanked her “Lovatics” for their support throughout her last year, during her recovery from emotional and physical issues. The 18-year-old singer and actress says her fans help keep her strong.

When Joe Jonas introduced his new single at “The Grill on Twenty First” restaurant this summer, 1,500 fans came to see it. While Joe was staying at the Trump SoHo in NYC, fans lined up outside the entire time. In fact, two 15-year-old fans split a $500/a night room just to try to get a GLIMPSE of him!